import java.io.File;
import java.io.IOException;
 
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;
 
public class Music extends Thread {
	private String fileName;
	private final int EXTERNAL_BUFFER_SIZE = 524288;
 
	public Music(String wavFile) {
		this.fileName = wavFile;
	}
 
	@SuppressWarnings("unused")
	public void run() {
		File soundFile = new File(fileName); // 播放音乐的文件名
		if (!soundFile.exists()) {
			System.err.println("不存在文件:" + fileName);
			return;
		}
		while (true) { // 设置循环播放
			AudioInputStream audioInputStream = null; // 创建音频输入流对象
			try {
				audioInputStream = AudioSystem.getAudioInputStream(soundFile); // 创建音频对象
			} catch (UnsupportedAudioFileException e1) {
				e1.printStackTrace();
				return;
			} catch (IOException e1) {
				e1.printStackTrace();
				return;
			}
			AudioFormat format = audioInputStream.getFormat(); // 音频格式
			SourceDataLine auline = null; // 源数据线
			DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
			try {
				auline = (SourceDataLine) AudioSystem.getLine(info);
				auline.open(format);
			} catch (LineUnavailableException e) {
				e.printStackTrace();
				return;
			} catch (Exception e) {
				e.printStackTrace();
				return;
			}
			if (auline.isControlSupported(FloatControl.Type.PAN)) {
				FloatControl pan = (FloatControl) auline.getControl(FloatControl.Type.PAN);
			}
			auline.start();
			int nBytesRead = 0;
			byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
			try {
				while (nBytesRead != -1) {
					nBytesRead = audioInputStream.read(abData, 0, abData.length);
					if (nBytesRead >= 0)
						auline.write(abData, 0, nBytesRead);
				}
			} catch (IOException e) {
				e.printStackTrace();
				return;
			} finally {
				auline.drain();
// auline.close();
			}
		}
	}
}